The vision of "dry bones" in Ezekiel 37 teaches that exiled Israel will be restored. In the vision, Ezekiel sees a valley filled with dry bones, which represents the exiled Israelites who have lost hope and are as good as dead. God instructs Ezekiel to prophesy to the bones, and as he does, they come to life and become a great army. This vision symbolizes the restoration of Israel, as God promises to bring the people back from exile and restore them to their land.